On my last homework, I started using Calca rather than a vanilla calculator. It’s nice to have the calculation history through a problem; I mean, most scientific calculators don’t have a “tape” you can look back on easily.
This morning I learned that Calca knows the quadratic formula, which is nice when I’m dealing with ugly equations I need to find the roots of.
Last semester, in my Statistical Modeling class, we studied a whole pile of hypothesis tests and confidence intervals. After a few, I realized that they all took a very similar form. The note-taking sheet below (PDF download here) lays out blocks for left-tailed test, right-tailed test, two-tailed test, and the confidence interval, with spaces to fill in the parts of the hypothesis test as described in an earlier stats is beautiful post.
As always, this page is Creative Commons licensed, asking for attribution to Heather Rollins or to this blog’s URL for non-commercial use. For commercial use, send me an email first. Thank you, and enjoy!
Tonight’s infographic is all about chronic pain. Note the visualization in the center, where only one little person out of more than 7,300 is highlighted, and compare it to the visualization above it, where it shows one person out of three. For every person who dies due to an overdose of opioid pain medications, another 3,029 Americans are suffering from chronic pain.
Those 3,029 people have to give a urine sample each time they need to see their pain management specialist. When they experience excruciating breakthrough pain, they are turned away at the emergency room as drug-seekers. Most of their doctors don’t know how to help them, and so these patients come to believe at least once in their journey that their pain and disability are their own fault. We need to change this conversation.